RC rychlostní katamarán Mini Shark 2.4GHz RTR (Blue)
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Water cooling takes water behind the propeller, circulates it around the engine and governor, and returns it to the surface. Without it, the powerful drive in the closed hull would overheat within minutes.
You can recognize it by the thin tube and outlet on the side of the fuselage . It is practically mandatory for brushless motors, but not necessary for slow models.
The fast models Proboat , Joysway and Hacker have a cooled drive. It is a good idea to flush the circuit after sailing, especially after driving in polluted water.
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